Push-key attachment for annunciators



. v J. P.-MARTIN.

Push-Key Attachment for Annunoiators.

No. 225,843. Patented Mar. 23, I880.

N- PETERSA PHOTWUTNOGRAPHER. WASHINGTON. D. C.

UNITE STATES PATENT OFFICE.

JOHN F. MARTIN, or oHIoAeo, ILLINOIS.

PUSH-KEY ATTACHMENT FOR ANNUNCIATORS.

SPECIFICATION forming part of Letters Patent No. 225,843, dated March23, 1880.

Application filed December 17, 1879.

To all whom it may concern Be it known that I, JOHN F. MARTIN, ofChicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements on Push-Key Attachments forAnnunciators; and I do hereby declare the following to be a full, clear,and exact description thereof, reference being had to the ac companyingdrawings, and to the letters of reference marked thereon, forming partof this specification.

The nature of my invention relates to an nunciators for hotels and otherbuildings; and it consists in an attachment for annunciator-keys wherebya connection may be made with the room or closet doors, so that whenanybody opens such door notice will be given at the office, as will behereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawings, in which-Figure 1 is a persective view of my invention. Fig. 2 is a detailed viewof a part thereof.

A represents the ordinary an nunciator -key, such as ordinarily used inhotels and other buildings, and arranged in a base, B. O is the cap forinelosing the base and key.

On the base 13 is a post, a, in which is pivoted one end of a lever, D,and this lever is passed through a slot in an auxiliary key, F, asshown. The auxiliary key is provided with a plate, E, which has holes inits ends for the passage of guide-pins I) b fastened to the base. Theplate E bears against the end of the main key A, while the auxiliary keyF projects through a circular opening in the cap 0. The other or freeend of the lever D has attached to it a cord, (1, which runs around aroller, 0, and through grooves in moldings Gr, attached to the wall inany suitable manner.

If it should be necessary to carry the cord by a corner, it is done byattaching a metal guide, H, in the corner, and in said guide is aroller, 6, for the cord to pass around. The cord will then run into thekeeper J for the lock-bolt, around a roller, 6 applied therein, and theend of the cord secured to one end of a pivoted lever, 1, within saidkeeper.

L represents the lock-bolt of the lock on the door M. In the end of thislock-bolt is a spring-latch, h, which, when the door is closed, catcheson the end of the lever I in the keeper. In opening the door this latchturns the lever I on its pivot sufficiently far to pull the cord at soas to operate the lever D and press the auxiliary key F against the mainkey A, and thus work the annunciator.

This attachment may be arranged to connect with the door of the room, orthe door of any closet in the room, and will thus give notice of theopening of such door by any unauthorized person. It may also be arrangedwith a pull-cord, to be convenient for invalids to call the attendants.

In some cases I may dispense with the lever used in connection with theauxiliary key and in its place, and to accomplish the same purpose I cuta slot from the lower end of the key up half-way, large enough toreceive a small roller or pulley. The cord then passes out from underthe molding, around a small roller in its end at its connection with thecap, passing under the cap at its base, running up over the push-keyproper, over the roller in the auxiliary key, and down on the oppositeside, and fastened to the cap.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-- 1. An attachment for anannunciator-key consisting of an auxiliary key mounted upon a pivotedlever, and said lever connected by a cord with a device in the keeper ofa doorlock to be operated by the opening of the door, substantially asand for the purposes herein set forth.

2. The combination of the annunciator-key, A, base B, post a, pivotedlever D, auxiliary key F, with plate E, guide-pins b b, and the cap 0,substantially as and for the purposes herein set forth.

3. The combination, with the annunciatorkey A, of the lever D, auxiliarykey F, with plate E, cord 01, pulleys c e, &c., keeper J, with lever I,and the spring-latch h in the lockbolt L, substantially as and for thepurposes herein set forth.

In testimony that I claim the foregoing I have hereunto set myhand this5th day of December, 1879.

JOHN F. MARTIN. Witnesses:

H. AUBREY ToULMIN, J. J. MoOAR'rHY.

